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Sekonic L-478DR Manual

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5-2. Measuring in Flash Light Mode
Flash illumination is light that is produced by the very brief light pulse of an electronic ash
unit or ash bulb. Flash measurement is available in the following modes:
•
Cord (PC) Flash Mode (PC/synchro cord connected)
•
Cordless Flash Mode
•
Cord Multiple (Cumulative) Flash Mode
•
Cordless Multiple (Cumulative) Flash Mode
•
Radio Triggering Mode (for L-478DR only)
•
Radio Triggering Multi (Cumulative) Mode (for L-478DR only)
Also see 4-3 Setting Measuring Mode (P25) for details on changing Measuring mode.
1. Screen Display Details
When ash light is measured, f-stop (Ambient
brightness + Flash brightness = total
exposure) is displayed on screen. The ratio of
ash light to the total exposure is displayed
at that time as a percentage in 10% steps.
Analog scale displays the relationship of both
the ambient component (orange line) and
ash component (blue).
2. About the Analog Scale Details
Touch the Analog scale to toggle the ambient/ash component ratio display ON or OFF.
3. Flash Analyzing Function
When measuring Flash light, the shutter speed
and f-stop (aperture) value, which is combining
ambient light and ash light: total amount of light,
are displayed on the LCD screen.
Ambient light and ash light are each
displayed as separate values along with the
total amount of light on the analog scale.
In addition, the ratio of ash light to the total
mount of light is displayed as a percentage (in 10
% steps) at the same time. The ratio of ash to the
total amount of light is useful when a desired ash
to ambient lighting ratio is needed.
<Example>
As in the screen on the right, if shutter speed is 1/125s and ISO sensitivity is 400, the
ash component and tungsten lamp light will be 50% each. Likewise, the respective
measuring results in the Analog Scale for ash light (blue) and Ambient Light (orange)
will denote this.
Setting
value
Percentage
of ash
Measuring screen
[Cord(PC) ash mode]
Measuring value (f-stop)
Measuring screen
(Cordless Flash Mode
Percentage
of Flash
Ambient component
Flash component
… 33 …


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  • Sekonic L478 DR
    The CH/ZONE setting is greyed out making it unavailable to set channel or zone. I have tried different settings in custom etc but not working. The unit it's new.
    Anyone know the answer? Submitted on 16-1-2022 at 06:49

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